Lobkis, Oleg I.Weaver, Richard L.2004-12-032004-12-0320012001http://hdl.handle.net/2003/114710.17877/DE290R-4072enThe American Physical SocietyPhysical Review Letters530Ultrasonics without a Source: Thermal Fluctuation Correlations at MHz Frequencies10.1103/PhysRevLett.87.134301article (journal)